Mad Men: The description says that “a risky venture entails a new future for Peggy” but knowing how close Weiner plays everything to the chest, this is probably a whole lot of nothing. What is interesting is that this episode should be taking place in July, 1969, so this should be our big moon landing episode. For what it’s worth. (Half-) Season finale. 8 p.m. Sunday, AMC

Blood Lake: It’s Shannen Doherty’s Sharknado, but with lampreys and no tornados. So do all the Beverly Hills 90210 actors get their own ridiculous animal disaster movie from here on out? Is that how this works? 8 p.m. Sunday, Animal Planet